159742289849 has 2 divisors, whose sum is σ = 159742289850. Its totient is φ = 159742289848.

The previous prime is 159742289813. The next prime is 159742289899. The reversal of 159742289849 is 948982247951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159654586624 + 87703225 = 399568^2 + 9365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159742289849 is a prime.

It is a super-3 number, since 3×159742289849³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (159742289899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79871144924 + 79871144925.

It is an arithmetic number, because the mean of its divisors is an integer number (79871144925).

Almost surely, 2^159742289849 is an apocalyptic number.

It is an amenable number.

159742289849 is a deficient number, since it is larger than the sum of its proper divisors (1).

159742289849 is an equidigital number, since it uses as much as digits as its factorization.

159742289849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 68.

The spelling of 159742289849 in words is "one hundred fifty-nine billion, seven hundred forty-two million, two hundred eighty-nine thousand, eight hundred forty-nine".